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Model specific boards => Golf mk4 => Topic started by: Ajamesc on 17 January 2017, 18:52

Title: Overboost after de-cat full system?
Post by: Ajamesc on 17 January 2017, 18:52

Anyone ever herd of this? Since fitting my full miltek system if I drive my car really hard it go's into limp mode. Fault logged was an over boost I was chatting to a local vw guy who also dose ecu maps who said it could be a boost spike due to the free flowing exhaust.

Title: Re: Overboost after de-cat full system?
Post by: Tezmax on 17 January 2017, 21:02

I suffered an over boost due to a leak via my downpipe/turbo manifold.

Best check for leaks first before spending any cash.

Title: Re: Overboost after de-cat full system?
Post by: Ajamesc on 17 January 2017, 21:14

Cheers for the reply I'll take a look at that

Title: Re: Overboost after de-cat full system?
Post by: OSR on 18 January 2017, 11:41

Yep my money's on vacuum leak too, had exactly this issue a couple of years ago.

Title: Re: Overboost after de-cat full system?
Post by: Ajamesc on 18 January 2017, 21:39

Turned out to be the dreaded turbo vains not moving I'll give it a good clean remove the egr and fingers crossed all with be good.

(http://i737.photobucket.com/albums/xx20/ajamesc8392/B00AF851-41EA-46B2-A39D-CFCF483ABF16_zpslvd5yxgh.jpg) (http://s737.photobucket.com/user/ajamesc8392/media/B00AF851-41EA-46B2-A39D-CFCF483ABF16_zpslvd5yxgh.jpg.html)

(http://i737.photobucket.com/albums/xx20/ajamesc8392/A84A9CBC-E2D0-4648-A8F4-C6059433714E_zpstnytpz6t.jpg) (http://s737.photobucket.com/user/ajamesc8392/media/A84A9CBC-E2D0-4648-A8F4-C6059433714E_zpstnytpz6t.jpg.html)

(http://i737.photobucket.com/albums/xx20/ajamesc8392/989EF882-4B66-4111-9E6D-BB4996F1857B_zpsdrupb9ps.jpg) (http://s737.photobucket.com/user/ajamesc8392/media/989EF882-4B66-4111-9E6D-BB4996F1857B_zpsdrupb9ps.jpg.html)

Title: Re: Overboost after de-cat full system?
Post by: Ajamesc on 19 January 2017, 21:41

All cleaned up and back together had to remove a lot of carbon from the inlet manifold and egr valve! Turbo vains move nice a free now also fitted a blanking plate to the exhaust manifold under the flexy pipe to the egr cooler so no crap get into the engine!